The process of a material corroding or deteriorating due to its own chemical properties or internal reactions, without external corrosive agents.
From auto- (self) + corrosion (from Latin corrosus, eaten away). A materials science term describing degradation from internal chemistry rather than external attack.
Some metals and alloys suffer autocorrosion because impurities within them create tiny electrochemical cells that eat away at the material from inside—it's like the metal is slowly poisoning itself, which is why alloy composition is so critically important for durability.
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